Could we see a screen-shot and your system specs? It really helps.
Oh, yeah, I'm not sending it to your e-mail, the forum is better and quicker. I prefer to be public with my answers rather than private.
Well, it could be that you have a diverse lightmap in your level. What lightmap quality do you have? 100 is a good quality, I keep mine at 500, 5000 works great but has a long load time and 50,000 is sick and takes an hour to load.
If you have no absolute clue what I'm talking about:
A.)Your computer needs to be up-to-date
B.)Re-Install FPSC because it is weirded up.
The red or the blue?,
==MeZo